Table of Contents
What do the Roman numerals mean in iron II?
The Roman numerals are meant to describe the oxidation state of the transition metal in a given compound. The (II) Roman numeral tells you that iron has a +2 oxidation state in iron(II) oxide, i.e. a 2+ charge.
What does the Roman numeral II in the chemical iron II nitrate indicate?
This is indicated by assigning a Roman numeral after the metal. The Roman numeral denotes the charge and the oxidation state of the transition metal ion. For example, iron can form two common ions, Fe2+ and Fe3+. To distinguish the difference, Fe2+ would be named iron (II) and Fe3+ would be named iron (III).
What is the formula for iron II nitrate?
Fe(NO₃)₃
Iron(III) nitrate/Formula
What does the II mean in iron II?
In chemistry, iron(II) refers to the element iron in its +2 oxidation state. In ionic compounds (salts), such an atom may occur as a separate cation (positive ion) denoted by Fe2+.
What does a Roman numeral after an element mean?
The use of Roman numerals in chemical nomenclature is to indicate the charge of the ion. Usually, the transitional metal has multiple possible ion charges. For example, Fe (II) stands for Fe2+ and Fe (III) stands for Fe3+; the charge changes according to the number of electrons on the atom.
How do you find Roman numerals in ionic compounds?
In naming the transition metal ion, add a Roman numeral in parenthesis after the name of the transition metal ion. The Roman numeral must have the same value as the charge of the ion. In our example, the transition metal ion Fe2+ would have the name iron(II).
Is Iron II nitrate?
Iron(II) nitrate is the nitrate of iron that is a green solid that forms the hexahydrate, Fe(NO3)2·6H2O. When heated it is oxidized to iron(III) nitrate….Iron(II) nitrate.
| Names | |
|---|---|
| Other names Ferrous nitrate | |
| Identifiers | |
| CAS Number | 14013-86-6 |
| ChemSpider | 7991154 |
What does the Roman numeral tell us in names such as copper II sulfate?
The Roman numerals indicate the ionic charge of the cation. In this case, it is an ionic charge of 3+ .
What does the Roman numeral (II) mean in iron(II) nitrate?
The Roman numeral “ (II)” in iron (II) nitrate, Fe (NO3)2, for instance, means that the iron in the compound is assigned an oxidation state of +2. This allows the naming to be distinguished from iron (III) nitrate, Fe (NO3)3.
How do you write the name for Fe(NO3)2?
Example #1 – write the name for Fe(NO3)2Step #1 – decide if the cation is one showing variable charge. If so, a Roman numeral will be needed. In this case, iron doesshow variable charge. If a variable charge cation is involved, you must determine the Roman numeral involved.
Why do some compounds have Roman numerals in their name?
The Roman numeral in the names of certain compounds is part of the “Stock system” of chemical nomenclature. The “Stock” comes from the name of Alfred Stock, a German chemist, who first proposed a new way of naming compounds based on the oxidation state of the metal (1919).
Why is the first part of the name of iron(III) 3?
Iron is an element with two possible oxidation states. The iron is a +3 charge because (1) there are three hydroxides, (2) hydroxide is a minus one charge, (3) this gives a total charge of negative three and (40 there is only one iron, so it must be a +3. Therefore the first part of the name is iron(III).